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7069-
E
7059-
E (17-06-2013)
TECHNICAL SPECIFICATIONS AB-168
SPECIFICATION: AASHTO (see note below)
POLYMER : Natural Rubber (NR)
ASTM DESCRIPTION
VALUE
SPECIFIC GRAVITY (gr/cc)
1.13
D2240
HARDNESS (Shore A)
60
D412
TENSILE (psi)
2250
min.
ULTIMATE ELONGATION (%)
450
min.
D746B
COLD TEMPERATURE
-48
0
C min.
D1171
OZONE RESISTANCE
48
hrs
25
PPHM @ 37.7
0
C
20%
Strain, No Cracks
D395B
COMPRESSION SET
22
hrs @ 70
0
C
25%
max.
D573
HEAT AGING
168
hrs @ 70
0
C
Changed
Hardness: + 10 points
Tensile: -25% max.
Elongation: -25% max.
Maximum pieces per roll : 1/4’’ to 1/2’’ = 2 pieces, over 1/2’’ = 1 piece
Minimum piece length : 10’
Width tolerance : 36’’ = -0 / +.236 in (6mm), 48’’ = -0 / +.472 in (12mm)
Length tolerance : 1/4’’ to 1/2’’ = -0 /+10%, over 1/2’’ = +10%, min. 10’
Gauge tolerance: < 1.259 in (32mm) = -0 / +.118 in (3mm), > 1.259 in (32mm) = -0 / +.236 in (6mm)
Note : Meets AASHTO Standard Specifications for Highway Bridges, 17th edition, 2002, Division ll - Construction :
Section 18 - Bearings, table 18.4.5.1-1B Material Tests - polyisoprene, Grade 4.
AASHTO Standard Specifications for Transportation Materials and Methods of Sampling and Testing, 22nd Edition,
2002,
M251-06 (2011), Polyisoprene Grade 4. It is not uncommon for certain states to specify requirements other than
standard AASHTO specifications. Please identify all requirements prior to ordering.
Please ensure the product meets your application specification prior to order placement.
Specifications are subject to change without notice. The website version prevails.